CN105444328A - Air conditioner shut down control method - Google Patents
Air conditioner shut down control method Download PDFInfo
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- CN105444328A CN105444328A CN201410346785.8A CN201410346785A CN105444328A CN 105444328 A CN105444328 A CN 105444328A CN 201410346785 A CN201410346785 A CN 201410346785A CN 105444328 A CN105444328 A CN 105444328A
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Abstract
The invention discloses an air conditioner shut down control method comprising the following steps: the air conditioner receives a shut down order, and compares a present running frequency and a set safe shut down frequency of a compressor; if the present running frequency is bigger than the safe shut down frequency, a soft stop procedure is carried out; if not, a normal stop procedure is carried out; the soft stop procedure comprises the following steps: controlling the compressor to slowly drop the present running frequency according to a set running curve until the machine stops; controlling an outdoor fan to run at a present running speed or a lower running speed before the compressor stops. The normal stop procedure comprises the following steps: controlling the compressor frequency to directly drop to 0Hz so as to stop; controlling the outdoor fan to delay-stop or directly stop. The novel method can control the high frequency compressor to slowly drop frequency until stops, and can control the high speed outdoor fan to do delay stop, thus reducing impact on air conditioner parts, and improving air conditioner reliability and running performance.
Description
Technical field
The invention belongs to air-conditioning technique field, specifically, relate to the control technology to air-conditioner, more particularly, relate to the method controlling air-conditioner shutdown.
Background technology
At present, air-conditioner is when receiving halt instruction, and control compressor and be directly down to 0Hz by current operation frequency, outdoor fan is also directly down to 0 and shut down by current running speed.This shutdown processing mode compressor current operation frequency and the current running speed of outdoor fan lower time, impact less to the miscellaneous part of compressor, blower fan and air-conditioner system, on air-conditioner whole aircraft reliability and runnability impact not very too large.But if compressor current operation frequency is higher, air-conditioner whole coolant circulating system pressure is larger; if compressor is directly shut down, system pressure cannot discharge, not only bad for compressor oil return; and compressor is impacted comparatively large, can compressor performance be reduced, shorten compressor service life.If the current running speed of outdoor fan is higher; direct shutdown is impacted large to blower fan; especially under air conditioner refrigerating operational mode; outdoor fan is directly shut down; the heat of off-premises station cannot be blown out in time; make each components over time place of off-premises station in high temperature environments, affect performance and the life-span of parts.Therefore, the reliability of air-conditioner complete machine and runnability can be caused to decline.
Summary of the invention
The object of this invention is to provide a kind of method controlling air-conditioner and shut down; when receiving halt instruction, the compressor controlling high frequency is slowly downconverted to shutdown, controls high-revolving outdoor fan time delay simultaneously and shuts down; reduce the impact to air-conditioner parts, improve reliability and the runnability of air-conditioner.
For achieving the above object, the present invention adopts following technical proposals to be achieved:
Control the method that air-conditioner is shut down, described method comprises:
Air-conditioner receives halt instruction, obtains the current operation frequency of compressor and the current running speed of outdoor fan;
The relatively size of the described current operation frequency of compressor and the compressor safe shutdown frequency of setting;
If the described current operation frequency of compressor is greater than described compressor safe shutdown frequency, perform soft stop process; Otherwise, perform orderly closedown process;
Wherein, described soft stop process is specially:
Whether the described current running speed judging outdoor fan is minimum speed;
If the described current running speed of outdoor fan is minimum speed, controls compressor and slowly decline from described current operation frequency according to setting operation curve, until shut down; Meanwhile, before compressor shutdown, control outdoor fan with described current running speed running;
If the described current running speed of outdoor fan is not least rotating speed, controls compressor and slowly decline from described current operation frequency according to setting operation curve, until shut down; Meanwhile, before compressor shutdown, control outdoor fan with the rotation speed operation lower than described current running speed;
Described orderly closedown process is specially:
Control compressor frequency be directly down to 0Hz and shut down, control outdoor fan time delay and shut down or directly shut down.
The method that control air-conditioner as above is shut down, when air-conditioner receives halt instruction, also comprises the process judging air-conditioner present mode of operation; If air-conditioner present mode of operation is refrigeration mode, in described soft stop process, after compressor shutdown; control outdoor fan time delay to shut down, if air-conditioner present mode of operation is heating mode, in described soft stop process; after compressor shutdown, control outdoor fan and directly shut down.
The method that control air-conditioner as above is shut down, described safe shutdown frequency is preferably 50-60Hz.
As above the method that the control air-conditioner described in item is shut down; control compressor slowly to decline from described current operation frequency according to setting operation curve; until the detailed process of shutting down is: control compressor according to a fixing fall off rate from described current operation frequency frequency reducing, until the near 0Hz of frequency and shutting down.
Or, control compressor and slowly decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to intermediate frequency according to the first fall off rate from described current operation frequency; Then, control compressor be downconverted to 0Hz according to the second fall off rate from described intermediate frequency and shut down; Wherein, described first fall off rate is less than described second fall off rate.
Or, control compressor and slowly decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to described safe shutdown frequency according to a fixing fall off rate from described current operation frequency; Then, control compressor and run setting-up time with described safe shutdown frequency; When arriving described setting-up time, controlling compressor and be directly down to 0Hz from described safe shutdown frequency and shut down.
Or, control compressor and slowly decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to intermediate frequency according to the 3rd fall off rate from described current operation frequency; Then, control compressor and be downconverted to described safe shutdown frequency according to the 4th fall off rate from described intermediate frequency; Then, control compressor and run setting-up time with described safe shutdown frequency; When arriving described setting-up time, controlling compressor and be directly down to 0Hz from described safe shutdown frequency and shut down; Wherein, described 3rd fall off rate is less than described 4th fall off rate.
Preferably, described setting-up time is 20-60s.
Compared with prior art, advantage of the present invention and good effect are: air-conditioner of the present invention is after receiving halt instruction, first judge the current operation frequency of compressor, when current operation frequency is high frequency, control the curve slow frequency reducing of compressor according to setting of high frequency, until shut down, simultaneously, Synchronization Control is carried out to the rotating speed of outdoor fan, control it and realize time delay shutdown with lower slightly rotation speed operation, avoid compressor directly shut down from high frequency and outdoor fan is directly shut down from high rotating speed time to compressor, the impact that outdoor fan and air-conditioner miscellaneous part cause, and effectively can reduce the thermic load of air-conditioner, improve compressor, the service life of outdoor fan and miscellaneous part, and when compressor current operation frequency is not more than safe shutdown frequency, controlling compressor directly shuts down, shut down speed to improve air-conditioner, improve the speed of air-conditioner response user instruction, thus, improve reliability and the runnability of air-conditioner complete machine.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention controls the method embodiment that air-conditioner is shut down;
Fig. 2 is the particular flow sheet of soft stop process in Fig. 1 embodiment;
Fig. 3 controls first operation curve figure that compressor frequency slowly declines in Fig. 2;
Fig. 4 is the controlling curve of outdoor fan corresponding with the compressor operating curve of Fig. 3 under air conditioner heat-production pattern;
Fig. 5 is the controlling curve of outdoor fan corresponding with the compressor operating curve of Fig. 3 under air-conditioner refrigeration mode;
Fig. 6 controls second operation curve figure that compressor frequency slowly declines in Fig. 2;
Fig. 7 is the controlling curve of outdoor fan corresponding with the compressor operating curve of Fig. 6 under air conditioner heat-production pattern;
Fig. 8 controls the 3rd the operation curve figure that compressor frequency slowly declines in Fig. 2;
Fig. 9 is the controlling curve of outdoor fan corresponding with the compressor operating curve of Fig. 8 under air conditioner heat-production pattern;
Figure 10 controls the 4th the operation curve figure that compressor frequency slowly declines in Fig. 2;
Figure 11 is the controlling curve of outdoor fan corresponding with the compressor operating curve of Figure 10 under air conditioner heat-production pattern.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below with reference to drawings and Examples, the present invention is described in further detail.
Refer to Fig. 1, this figure is depicted as the flow chart that the present invention controls the method embodiment that air-conditioner is shut down.
As shown in Figure 1, the process of this embodiment control air-conditioner shutdown is as follows:
Step 11: air-conditioner receives halt instruction.
Air-conditioner receives halt instruction; refer to that the controller of air-conditioner detects air-conditioner main electricity power-off signal or the stopping signal that its control panel receives detected or the stopping signal that its remote control signal receiver circuit receives detected; when these signals being detected, all judge the halt instruction receiving air-conditioner.
Step 12: obtain the current operation frequency of compressor and the current running speed of outdoor fan.
When receiving halt instruction, controller first obtains the current operation frequency of cooler compressor and the current running speed of outdoor fan.The running frequency of compressor and the running speed of outdoor fan are generally send instruction by controller to control; therefore; controller, when receiving halt instruction, can get the current operation frequency of this moment compressor and the current running speed of outdoor fan easily.And the running speed of outdoor fan is directly proportional to the running frequency of compressor, and compressor operating frequency is higher, and the running speed of outdoor fan is higher.Otherwise compressor operating frequency is lower, the running speed of outdoor fan is also lower.
Step 13: judge whether the current operation frequency of compressor is greater than safe shutdown frequency.If be greater than, perform step 14; Otherwise, go to step 15.
Safe shutdown frequency refers to that compressor directly can be down to 0Hz and a frequency values of shutting down; this frequency values is the value preset; generally relevant to the parameter such as type of compressor; can being stored in advance in controller of air conditioner by producer when air-conditioner dispatches from the factory, also can being written in controller when keeping in repair by personnel after sale.Preferably, safe shutdown frequency is 50-60Hz, preferred, and safe shutdown frequency is 58Hz.After step 12 gets compressor current operation frequency, itself and the safe shutdown frequency preset are made comparisons, the magnitude relationship of both judgements, performs different shutdown processing procedures according to comparative result.
Step 14: if step 13 judges that the current operation frequency of compressor is greater than safe shutdown frequency, then perform soft stop process.
The specific implementation of soft stop process is shown in Figure 2 and below to the description of Fig. 2.
Step 15: if step 13 judges that the current operation frequency of compressor is not more than safe shutdown frequency, then perform orderly closedown process.Specifically, be control compressor frequency be directly down to 0Hz and shut down, meanwhile, control outdoor fan time delay and shut down or directly shut down.
When receiving halt instruction; if the current operation frequency of compressor is not more than safe shutdown frequency; show that now compressor operating frequency is lower; the pressure of air conditioner circulating system can not be too high; even if do not discharge immediately and also can not cause greater impact to system, therefore, control compressor directly to shut down; make air-conditioner can respond the halt instruction of user fast, handling to air-conditioner of adding users.Meanwhile, control outdoor fan can directly shut down or time delay shutdown.Specifically, if air-conditioner runs heating mode before shutting down, outdoor fan can be controlled and directly shut down.If air-conditioner running refrigerating pattern before shutting down, off-premises station temperature is higher, and control outdoor fan time delay a period of time shuts down again, as time delay 30s, by the waste heat blowout in off-premises station, to avoid because off-premises station temperature is high and to damage air-conditioner parts.
Corresponding, for judging that outdoor fan is directly shut down or time delay is shut down, when air-conditioner receives halt instruction, also to judge that the present mode of operation of air-conditioner is refrigeration mode or heating mode.
As shown in Figure 2, the concrete control procedure of soft stop is as follows:
Step 141: when receiving halt instruction, if the current operation frequency of compressor is greater than safe shutdown frequency, more whether the current running speed judging outdoor fan is minimum speed.If so, step 142 is performed; If NO, step 143 is performed.
Step 142: if the current running speed of outdoor fan is minimum speed, controls compressor and slowly declines from current operation frequency according to setting operation curve, until shut down; Meanwhile, in the process before compressor operating frequency starts to drop to shutdown, control outdoor fan and operate with current running speed, also namely with minimum speed running, ensure that outdoor fan is not shut down before compressor shutdown.
Step 143, if the current running speed of outdoor fan is not minimum speed, controls compressor and slowly declines from current operation frequency according to setting operation curve, until shut down; Meanwhile, in the process before compressor operating frequency starts to drop to shutdown, control outdoor fan with the rotation speed operation lower than current running speed.Preferably, outdoor fan is controlled with the rotation speed operation of one-level lower than current running speed.
In this step, because compressor frequency is in decline, for ensureing that compressor keeps synchronous with running between outdoor fan, corresponding regulation and control are done to the rotating speed of outdoor fan.Specifically, be that the rotating speed controlling outdoor fan declines, and before compressor shutdown, keep outdoor fan not shut down.
After compressor shutdown, outdoor fan can be controlled and directly shut down or time delay shutdown.Specifically, similar with above-mentioned orderly closedown process, if air-conditioner runs heating mode before shutting down, outdoor fan can be controlled and directly shut down.If air-conditioner running refrigerating pattern before shutting down, off-premises station temperature is higher, and control outdoor fan time delay a period of time shuts down again, as time delay 30s, by the waste heat blowout in off-premises station, to avoid because off-premises station temperature is high and to damage air-conditioner parts.
This embodiment is when performing soft stop; the running frequency controlling compressor slowly declines from current operation frequency; until near 0Hz and shutting down, the compressor of high frequency can be avoided because shutting down suddenly to cause high temperature in air-conditioner system, high pressure to discharge in time and the impact caused various parts and damage.And before compressor shutdown; control outdoor fan not shut down; and with the rotation speed operation with compressor frequency synchronised; reduce the thermic load of air-conditioner in the most efficient manner; further minimizing, to the impact of compressor, outdoor fan and other air-conditioner parts and damage, improves complete machine security performance and the functional reliability of air-conditioner.
Controlling the running frequency of compressor from the process that current operation frequency slowly declines, different operation curves can adopted as required to control the frequency of compressor, realize the slow decline of compressor operating frequency.Specifically, each operation curve shown in Fig. 3, Fig. 6, Fig. 8 and Figure 10 can be adopted to control.
Refer to Fig. 3, this figure is depicted as first the operation curve figure controlling compressor frequency and slowly decline, specifically, be control compressor according to a fixing fall off rate from current operation frequency frequency reducing until one of the near 0Hz of frequency is run controlling curve shown in this figure.
Concrete, in curve map shown in Fig. 3, transverse axis is time shaft t(s), the longitudinal axis is compressor operating frequency f (Hz).In the t1 moment, air-conditioner receives halt instruction; Now, the current operation frequency of compressor is F.And F is greater than the safe shutdown frequency of compressor.Then, linearly declined from current operation frequency F with fall off rate k1 by control compressor, until the t2 moment, compressor operating frequency reduces to 0Hz.Fall off rate k1 is preset value, and the requirement to the speed of shutdown can preset according to type of compressor and user, such as, setting k1 is 2Hz per second.Then, compressor from the t1 moment, with the speed of 2Hz per second, slow decline from current operation frequency F.
The controlling curve of the outdoor fan corresponding with Fig. 3 compressor operating curve is see shown in Fig. 4 and Fig. 5.Wherein, Fig. 4 shuts down corresponding controlling curve under air conditioner heat-production pattern, and Fig. 5 shuts down corresponding controlling curve under air-conditioner refrigeration mode.
In the outdoor fan controlling curve of Fig. 4, transverse axis is time shaft t(s), the longitudinal axis is outdoor fan running speed n (r/min).In the t1 moment receiving halt instruction, the current running speed N of outdoor fan is not minimum speed, and operating modes of air conditioner is heating mode.After this, within t1 to the t2 time period controlled compressor operating frequency, controlling the running speed decline one-level of outdoor fan, is N1 to rotating speed, then, controls outdoor fan and operates with this rotating speed N1.In the t2 moment, compressor operating frequency reduces to 0Hz, controls outdoor fan and also stops operating and shut down.
In the outdoor fan controlling curve of Fig. 5, transverse axis is time shaft t(s), the longitudinal axis is outdoor fan running speed n (r/min).In the t1 moment receiving halt instruction, the current running speed N of outdoor fan is not minimum speed, and operating modes of air conditioner is refrigeration mode.After this, within t1 to the t2 time period controlled compressor operating frequency, controlling the running speed decline one-level of outdoor fan, is N1 to rotating speed, then, controls outdoor fan and operates with this rotating speed N1.In the t2 moment, compressor operating frequency reduces to 0Hz, controls outdoor fan and still keeps rotating speed N1 to move to the t3 moment, and then shut down.As previously mentioned, the time delay of t2 to t3 is preferably 30s downtime.
Refer to Fig. 6, this figure is depicted as second the operation curve figure controlling compressor frequency and slowly decline, specifically, be control compressor according to two different fall off rates from current operation frequency frequency reducing until one of the near 0Hz of frequency is run controlling curve shown in this figure.
Concrete, in curve map shown in Fig. 6, transverse axis is time shaft t(s), the longitudinal axis is compressor operating frequency f (Hz).In the t1 moment, air-conditioner receives halt instruction; Now, the current operation frequency of compressor is F.And F is greater than the safe shutdown frequency of compressor.Then, first control compressor and linearly decline from current operation frequency F with fall off rate k2, until the t2 moment, compressor operating frequency drops to an intermediate frequency Fz1.Then, from the t2 moment, then control compressor with fall off rate k3 linear decline from intermediate frequency Fz1, until the t3 moment drops to 0Hz.
Wherein, fall off rate k2 and k3 is preset value, the requirement to the speed of shutdown can preset according to type of compressor and user.And k2 is less than k3.Such as, setting k2 is 1Hz, k3 per second is 2Hz per second.Then, compressor, within the time period of t1 to t2, with the speed of 1Hz per second, slowly drops to intermediate frequency Fz1, and within the time period of t2 to t3, with the speed of 2Hz per second, drops to 0Hz from intermediate frequency Fz1 from current operation frequency F.
According to the curve controlled compressor operating of this Fig. 6, the incipient stage of shutting down, control compressor with speed decline more slowly, avoid the sudden change of compressor operating frequency.Then control compressor and decline, to shorten the compressor shutdown time with speed faster then.
The controlling curve of the outdoor fan corresponding with Fig. 6 compressor operating curve is shown in Figure 7.Specifically, be under air conditioner heat-production pattern, shut down corresponding controlling curve.
In the outdoor fan controlling curve of Fig. 7, transverse axis is time shaft t(s), the longitudinal axis is outdoor fan running speed n (r/min).In the t1 moment receiving halt instruction, the current running speed N of outdoor fan is not minimum speed, and operating modes of air conditioner is heating mode.After this, within t1 to the t3 time period controlled compressor operating frequency, controlling the running speed decline one-level of outdoor fan, is N1 to rotating speed, then, controls outdoor fan and operates with this rotating speed N1.In the t3 moment, compressor operating frequency reduces to 0Hz, controls outdoor fan and also stops operating and shut down.
Refer to Fig. 8, this figure is depicted as and controls the 3rd operation curve figure slowly declining of compressor frequency, specifically, is control compressor decline according to a fixing fall off rate and have an operation controlling curve of oil return platform shown in this figure.
Concrete, in the curve map shown in Fig. 8, transverse axis is time shaft t(s), the longitudinal axis is compressor operating frequency f (Hz).In the t1 moment, air-conditioner receives halt instruction; Now, the current operation frequency of compressor is F.And F is greater than the safe shutdown frequency of compressor.Then, linearly declined from current operation frequency F with fall off rate k4 by control compressor, until the t2 moment, its frequency is down to safe shutdown frequency Fa.Then, control compressor to bring into operation to the t3 moment from the t2 moment with safe shutdown frequency.Also, namely, in the setting-up time section of t2 to t3, compressor keeps safe shutdown frequency Fa constant.When the arrival t3 moment, control compressor and be directly down to 0Hz from safe shutdown frequency Fa and shut down.
Wherein, fall off rate k4 is also preset value, and the requirement to the speed of shutdown can preset according to type of compressor and user, such as, setting k4 is also 2Hz per second.Then, compressor, from the t1 moment, with the speed of 2Hz per second, slowly drops to safe shutdown frequency Fa from current operation frequency F.
In this operation curve, control compressor and run t2 to t3 during this period of time on safe shutdown frequency Fa, this time period as compressor oil return platform, can utilize compressor stable operation at a lower frequency, realizes the abundant oil return of compressor.The time period of t2 to t3, as the oil return time period, is also the default time.This time is preferably 20-60s, and more preferred values is 30s.For taking into account shutdown speed, after completing oil return, controlling compressor and directly shutting down from safe shutdown frequency Fa.
The controlling curve of the outdoor fan corresponding with Fig. 8 compressor operating curve is shown in Figure 9.Specifically, be under air conditioner heat-production pattern, shut down corresponding controlling curve.
In the outdoor fan controlling curve of Fig. 9, transverse axis is time shaft t(s), the longitudinal axis is outdoor fan running speed n (r/min).In the t1 moment receiving halt instruction, the current running speed N of outdoor fan is not minimum speed, and operating modes of air conditioner is heating mode.After this, within t1 to the t3 time period controlled compressor operating frequency, controlling the running speed decline one-level of outdoor fan, is N1 to rotating speed, then, controls outdoor fan and operates with this rotating speed N1.In the t3 moment, compressor operating frequency reduces to 0Hz, controls outdoor fan and also stops operating and shut down.
Refer to Figure 10, this figure is depicted as and controls the 4th operation curve figure slowly declining of compressor frequency, specifically, is control compressor decline according to two different fall off rates and have an operation controlling curve of oil return platform shown in this figure.
Concrete, in curve map shown in Figure 10, transverse axis is time shaft t(s), the longitudinal axis is compressor operating frequency f (Hz).In the t1 moment, air-conditioner receives halt instruction; Now, the current operation frequency of compressor is F.And F is greater than the safe shutdown frequency of compressor.Then, first control compressor and linearly decline from current operation frequency F with fall off rate k5, until the t2 moment, compressor operating frequency drops to an intermediate frequency Fz2.Then, from the t2 moment, then control compressor with fall off rate k6 linear decline from intermediate frequency Fz2, until the t3 moment drops to safe shutdown frequency Fa.Then, control compressor to bring into operation to the t4 moment from the t3 moment with safe shutdown frequency.Also, namely, in the setting-up time section of t3 to t4, compressor keeps safe shutdown frequency Fa constant.When the arrival t4 moment, control compressor and be directly down to 0Hz from safe shutdown frequency Fa and shut down.
Wherein, fall off rate k5 and k6 is preset value, the requirement to the speed of shutdown can preset according to type of compressor and user.And k2 is less than k3.Such as, similar with Fig. 6, setting k5 is 1Hz, k6 per second is 2Hz per second.Then, compressor, within the time period of t1 to t2, with the speed of 1Hz per second, slowly drops to intermediate frequency Fz2, and within the time period of t2 to t3, with the speed of 2Hz per second, drops to safe shutdown frequency Fa from intermediate frequency Fz1 from current operation frequency F.
In this embodiment, control compressor and run t3 to t4 during this period of time on safe shutdown frequency Fa, this time period as compressor oil return platform, can utilize compressor stable operation at a lower frequency, realizes the abundant oil return of compressor.The time period of T3 to t4, as the oil return time period, is also the default time.Similar with Fig. 8, this time is preferably 20-60s, and more preferred values is 30s.For taking into account shutdown speed, after completing oil return, controlling compressor and directly shutting down from safe shutdown frequency Fa.
According to the curve controlled compressor operating shown in this Figure 10, the incipient stage of shutting down, control compressor with speed decline more slowly, avoid the sudden change of compressor operating frequency.Then control compressor and decline, to shorten the compressor shutdown time with speed faster then.And by increasing oil return platform, make the abundant oil return of compressor.After oil return, control compressor and directly shut down from safe shutdown frequency, shorten the compressor shutdown time further, accelerate shutdown speed.
The controlling curve of the outdoor fan corresponding with Figure 10 compressor operating curve is shown in Figure 11.Specifically, be under air conditioner heat-production pattern, shut down corresponding controlling curve.
In the outdoor fan controlling curve of Figure 11, transverse axis is time shaft t(s), the longitudinal axis is outdoor fan running speed n (r/min).In the t1 moment receiving halt instruction, the current running speed N of outdoor fan is minimum speed, and operating modes of air conditioner is heating mode.After this, within t1 to the t4 time period that compressor operating frequency is controlled, control outdoor fan and operate with minimum speed N.In the t4 moment, compressor operating frequency reduces to 0Hz, controls outdoor fan and also stops operating and shut down.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (8)
1. control the method that air-conditioner is shut down, it is characterized in that, described method comprises:
Air-conditioner receives halt instruction, obtains the current operation frequency of compressor and the current running speed of outdoor fan;
The relatively size of the described current operation frequency of compressor and the compressor safe shutdown frequency of setting;
If the described current operation frequency of compressor is greater than described safe shutdown frequency, perform soft stop process; Otherwise, perform orderly closedown process;
Wherein, described soft stop process is specially:
Whether the described current running speed judging outdoor fan is minimum speed;
If the described current running speed of outdoor fan is minimum speed, controls compressor and slowly decline from described current operation frequency according to setting operation curve, until shut down; Meanwhile, before compressor shutdown, control outdoor fan with described current running speed running;
If the described current running speed of outdoor fan is not least rotating speed, controls compressor and slowly decline from described current operation frequency according to setting operation curve, until shut down; Meanwhile, before compressor shutdown, control outdoor fan with the rotation speed operation lower than described current running speed;
Described orderly closedown process is specially:
Control compressor frequency be directly down to 0Hz and shut down, control outdoor fan time delay and shut down or directly shut down.
2. the method for control air-conditioner shutdown according to claim 1, is characterized in that, when air-conditioner receives halt instruction, also comprise the process judging air-conditioner present mode of operation; If air-conditioner present mode of operation is refrigeration mode, in described soft stop process, after compressor shutdown; control outdoor fan time delay to shut down, if air-conditioner present mode of operation is heating mode, in described soft stop process; after compressor shutdown, control outdoor fan and directly shut down.
3. the method for control air-conditioner shutdown according to claim 1, it is characterized in that, described safe shutdown frequency is 50-60Hz.
4. the method for control air-conditioner shutdown according to any one of claim 1 to 3; it is characterized in that; control compressor slowly to decline from described current operation frequency according to setting operation curve; until the detailed process of shutting down is: control compressor according to a fixing fall off rate from described current operation frequency frequency reducing, until the near 0Hz of frequency and shutting down.
5. the method for control air-conditioner shutdown according to any one of claim 1 to 3, it is characterized in that, control compressor slowly to decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to intermediate frequency according to the first fall off rate from described current operation frequency; Then, control compressor be downconverted to 0Hz according to the second fall off rate from described intermediate frequency and shut down; Wherein, described first fall off rate is less than described second fall off rate.
6. the method for control air-conditioner shutdown according to any one of claim 1 to 3, it is characterized in that, control compressor slowly to decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to described safe shutdown frequency according to a fixing fall off rate from described current operation frequency; Then, control compressor and run setting-up time with described safe shutdown frequency; When arriving described setting-up time, controlling compressor and be directly down to 0Hz from described safe shutdown frequency and shut down.
7. the method for control air-conditioner shutdown according to any one of claim 1 to 3, it is characterized in that, control compressor slowly to decline from described current operation frequency according to setting operation curve, until the detailed process of shutting down is: control compressor and be downconverted to intermediate frequency according to the 3rd fall off rate from described current operation frequency; Then, control compressor and be downconverted to described safe shutdown frequency according to the 4th fall off rate from described intermediate frequency; Then, control compressor and run setting-up time with described safe shutdown frequency; When arriving described setting-up time, controlling compressor and be directly down to 0Hz from described safe shutdown frequency and shut down; Wherein, described 3rd fall off rate is less than described 4th fall off rate.
8. the method that the control air-conditioner according to claim 6 or 7 is shut down, it is characterized in that, described setting-up time is 20-60s.
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| CN106440194A (en) * | 2016-09-20 | 2017-02-22 | 青岛海尔空调器有限总公司 | Fixed-frequency air conditioner shutdown control method and device |
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| CN111512098A (en) * | 2018-01-24 | 2020-08-07 | 东芝开利株式会社 | Refrigeration cycle device |
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| CN112178885A (en) * | 2020-09-08 | 2021-01-05 | Tcl空调器(中山)有限公司 | Shutdown control method of compressor and air conditioning equipment |
| CN113108436A (en) * | 2021-04-07 | 2021-07-13 | 广东美的制冷设备有限公司 | Portable air conditioner, control method and device thereof and storage medium |
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| CN113465152A (en) * | 2021-06-02 | 2021-10-01 | 浙江吉利控股集团有限公司 | Air conditioner fan system, control method, air conditioner and storage medium |
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